98.5% efficiency of the Multicyclone helps in maximum utilization of chargeable powder. But to comply with Pollution Control Laws, the 1.5% powder fines are required to be arrested. The post filter arrests this powder and gives out breathable air. A number of filter cartridges are mounted inside the sealed metallic chamber. The air enters the chamber and the filteration occurs ''outside in''. Periodic purge removes the powder and clean the cartridge. Clean air is given out through the blower outlet.